Topological nanophotonics: towards robust quantum circuits

Andrea Blanco-Redondo

doi:10.1117/12.2567239

20 August 2020 Topological nanophotonics: towards robust quantum circuits

Andrea Blanco-Redondo

Proceedings Volume 11461, Active Photonic Platforms XII; 114610Z (2020) https://doi.org/10.1117/12.2567239
Event: SPIE Nanoscience + Engineering, 2020, Online Only

Abstract

After a successful decade of purely fundamental research, the topological photonics community is starting to explore applications more seriously. Among the most promising fields of application for topological photonics are integrated laser sources and quantum circuits. In this talk I will review the latest results on topologically protected quantum states of light, with an emphasis on our recent experimental demonstration of topological protection of photonic path entanglement. Our experimental platform is a bipartite lattice of silicon nanowires which supports to uncoupled topological edge states. By using a common weak pump evenly split between the two edge modes, and leveraging four-wave mixing in the silicon nanowires, we were able to encode a biphoton N00N state of two topological edge modes. We demonstrate that this spatial entanglement is preserved even in the presence of deliberately induced disorder in the position of the waveguides.

Conference Presentation

Citation Download Citation

Andrea Blanco-Redondo "Topological nanophotonics: towards robust quantum circuits", Proc. SPIE 11461, Active Photonic Platforms XII, 114610Z (20 August 2020); https://doi.org/10.1117/12.2567239

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